Abstract
Summary
Representative strains of streptococcus group H and Streptococcus sanguis and of 40 strains from samples of air and from cases of subacute bacterial endocarditis identified as group H were tested with unabsorbed and selected absorbed antisera produced against streptococcus group H No. 36251 and Streptococcus sanguis types I and II. The results of the tests indicated that the strains belonged in at least 5 antigenically different types.
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